US3587254A

US3587254A - Guide bar swinging mechanism for a warp knitting machine

Info

Publication number: US3587254A
Application number: US859468A
Authority: US
Inventors: Karl Kohl
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-09-28
Filing date: 1969-09-19
Publication date: 1971-06-28
Anticipated expiration: 1988-06-28
Also published as: US3587252A; DE6750484U; GB1248517A

Abstract

A WARP KNITTING MACHINE IN WHICH THE CARRIER ARMS FOR THE NEEDLE BAR ARE PIVOTALLY MOUNTED ON THE SINKER-BAR ROCKING SHAFT, AND THE GUIDE BARS FOR THE YARN GUIDES ARE MOUNTED ON ONE ARM OF A TWO-ARMED LEVER WHOSE OTHER ARM IS ATTACHED TO THE SINKER-BAR ROCKING SHAFT BY A HINGED LINK. THE FULCRUM OF THE LEVER IS MOUNTED ON THE FREE END OF A RADIAL ARM FIXED ON THE GUIDE-BAR ROCKING SHAFT. THE TWO SHAFTS ARE REARWARDLY OFFSET FROM THE KNITTING NEEDLES AND THE YARN GUIDES, AND THE LEVER IS VERTICALLY INTERPOSED BETWEEN THE TWO SHAFTS.

Description

United States Patent [56] References Cited FOREIGN PATENTS [72] Inventor Karl Kohl Offenbacher Landstr. 20

lllinltadt (Main), Germany l mu mK M M m m4 wmmm Ar -PP nnunnn.

ABSTRACT: A warp knitting machine in which the carrier arms for the needle bar are pivotally mounted on the sinkerbar rocking shafi, and the guide bars for the yarn guides are [54] FOR A mounted on one arm of a two-anned lever whose other arm is 3 Cum 2 mm m attached to the sinker-bar rocking shaft by a hinged link. The

" fulcrum of the lever is mounted on the free end of a radial arm 66/86 fixed on the guide-bar rocking shaft. The two shafts are rearwardly offset from the knitting needles and the yarn guides, 66/86 and the lever is vertically interposed between the two shafts.

m n M s11 lnt.Cl............... [so] PATENTEI] Juuzalsn INVENTOR 1 K/(RL Mom. {By/M Ma y Asa/r GUIDE BAR SWINGING MECHANISM FOR A WARP KNITTING MACHINE This invention relates to an improved guide-bar swinging mechanism for a warp knitting machine of the type in which the carrier arms for the needle bars are rotatably mounted on the sinker-bar rocking shaft.

The known warp knitting machine with the improvement of which this invention is concerned has been described in Warp Knitting Technology" by D. F. Paling (Columbine Press, Manchester, 2nd ed., 1965, pages l46, FIGS. l2, l4 and 18). The guide bars of the known machine are longitudinally movable in a suspension system attached to a rocking shaft which is oscillated by a motion transmission train connected to the main drive shaft of the machine. The rocking shaft is located near the longitudinal median plane of the guide bar assembly so that it obstructs access to the yarn guides by the yarn drawn from the beams. It is necessary to guide the yarn in circuitous paths around the yarn-guide rocking shaft.

It has therefore been proposed to mount the yarn guide assembly on a four-pivot linkage which leaves the space above the guide bars unencumbered. This improvement is achieved at a sacrifice in accessibility of the knitting area for repair and maintenance work, at least one additional shaft running the width of the machine being required for supporting the linkage in addition to the guide bar rocking shaft.

The object of the invention is a further improvement in the yarn guide swinging mechanism which avoids a multiplicity of shafts and associated elements.

According to the instant invention, an ann fixedly fastened to the guide-bar rocking shaft has a free end, and a two-anned lever is fulcrumed on this free end. A link is pivotally connected to one arm of the lever and to the sinker-bar rocking shaft. The guide bars are mounted on the other arm of the lever, and the swinging movement of the guide bars is brought about by oscillating the guidebar rocking shaft in a basically conventional manner.

The arrangement outlined above pennits the guide-bar rocking shaft and the sinker rocking shaft to be arranged one above the other and to be rearwardly offset from the needles and the guide bars, the lever being vertically interposed between the two shafts so as to occupy a minimum of otherwise useful space.

Other features and advantages of the invention will hereinafter become more fully apparent from the following description of the annexed drawing which illustrates a preferred embodiment, and wherein:

FIG. I shows a warp knitting machine in fragmentary side elevation, and partly in section; and

FIG. 2 is a fragmentary side-elevational view of the same machine taken in section in a plane spacedly parallel to that of FIG. 1.

Referring initially to FIG. 1, there is seen only as much of an otherwise conventional warp knitting machine as is needed for an understanding of this invention. The bearded needles 1 of the machine are mounted on a needle bar 2. The bar is fastened to several carrier arms 3 which are pivoted on the sinker-bar rocking shaft 4 of the machine, only one arm 3 being visible in FIG. 1. Push-rods 5 connect the several arms 3 to eccentrics on the main drive shaft of the machine in a manner well-known in itself and not illustrated.

The yarn guides 6 of the machine are mounted on guide bars 7 longitudinally movable on one arm 8 of a two-armed lever. The fulcrum of the lever between its two arms 8, 9 is a ball bearing on the free end of a radial arm 10 fixedly fastened to a guide-bar rocking shaft 12, the

shafts

4, 12 being journaled in the knitting machine frame 25 only partly seen in the drawing. The two ends of a link 11 are respectively fastened to the lever arm 9 and to the sinker-bar rocking shaft 4'by antifriction bearings.

The guide-bar rocking shaftl2 is oscillated about its axis in a basically conventional manner by a fixedly fastened radial arm 13 linked by a connecting rod 14 to the free end of an arm 15 pivoted on the frame 25 by a gush-rod 16. The latter is moved in a substantially longitudina direction by an eccentric on the aforementioned main drive shaft of the machine, not shown.

The sinkers 17 of the illustrated machine are mounted on a sinker bar 18 which is linked to the sinker-rocking shaft 4 in a known manner, as is more fully shown in FIG. 2. The sinker bar 18 is supported on several carrier arms 19 pivoted on the stationary sinker shaft 20. A push-rod 21 is moved longitudinally by a nonillustrated eccentric on the main drive shaft of the machine. It is hingedly fastened to a radial arm 22 fixed on the sinker-bar rocking shaft 4. Another radial arm 23 on the last-mentioned shaft is connected with the carrier arm 19 by a hinged link 24.

The sinker-bar rocking shaft 4 thus not only supports the carrier arms 3 for the needlebar 2 but also constitutes one of the pivots in the four-pivot linkage which swings the guide bars 7.

I claim:

1. In a warp knitting machine having a frame, a sinker-bar rocking shaft journaled in said frame, a sinker-bar mechanism for oscillating said shaft, avsinker bar movably mounted on said frame and connected to said shaft for movement thereby, a plurality of guide bars, a guide-bar suspension carrying said guide bars, and a guide-bar swinging mechanism connected to said suspension for swinging said guide bars forward and backward, the improvement in the guide-bar suspension which comprises:

a. a guide-bar rocking shaft journaled in said frame;

b. an arm fixedly fastened to said guide-bar rocker shaft and having a free end spaced from said last-mentioned shaft;

c. a two-armed lever fulcrumed on said free end; and

d. a link pivotally connected to one arm of said lever and to said sinker-bar rocking shaft,

1. said guide bars being mounted on the other arm of said lever, and

2. said guide-bar swinging mechanism including means for oscillating said guide-bar rocking shaft.

2. In a machine as set forth in claim I, said shafts being offset from said guide bars in the direction of backward swinging motion of the latter and being spaced from each other transversely of said direction, said lever being interposed between said shafts.

3. In a machine as set forth in claim 2, a carrier arm pivotally mounted on said rocking shaft, a needle bar mounted on said carrier arm, and a needle bar mechanism linked to said carrier arm for pivoting the same.